When clicking on a QSO / row in the Logbook you will get to the QSO Edit Page. Here you will get a overview of the QSO as well as the option to edit and save it.
The Page shows you all informations similar to the Logger Page on the left and some Information about the QSL / Upload status to external Services on the Right. You can edit each Field as you like, select another Logbook if you want to move it and hit save. If you wan't to delete a QSO you just hit the Delete Button on the Bottom left and confirm the Modal if you really wan't to delete it.